Thanks for you reply Fred. I checked the 2 images, I still don't understand why just using "-alpha on" fails, based on the description of alpha on in the docs.
compare confuses me anyway, why does the order of the 2 images to compare matter? Still on the 2 icons I referenced earlier, the last commands I was trying were: compare -channel RGBA -alpha on -metric ae crushed.png original.png /dev/null 2 <- I expect 0 here, why is it 2? compare -channel RGBA -alpha on -metric ae original.png crushed.png /dev/null 98 <- wtf? compare -channel RGBA -alpha set -metric ae crushed.png original.png /dev/null 0 compare -channel RGBA -alpha set -metric ae original.png crushed.png /dev/null 0 These last 2 look promising, but I don't trust that they do what I want for images that do contain an alpha. I appreciate the one-liner replies but is there a place with more info for me to figure this out, please? Thanks in advance, Tim. On 31 December 2009 am 11:38:28 Fred Weinhaus wrote: > >Sorry I'm kind of new to this, how would I go about checking out the > > actual structure of the first non-optimized image? > > identify -verbose image.png _______________________________________________ Magick-users mailing list [email protected] http://studio.imagemagick.org/mailman/listinfo/magick-users
